Mounting for sewing-machine motors



July 14, 1925; 1,545,687 L. C. PACKER MOUNTING FOR SEWING MACHINE MOTORS Fiied Feb; 19; 1921 2 Sheets-Sheet 1 WITNESSES:

July '14, 1925.

1.. c. PACKER MOUNTING FOR SEWING MACHINE MOTORS Filed Feb. 19, 1921 '2 Sheets-Sheet 2 WITNESSES:

and State of proved manner to .fonm a strong,

Patented July 14, 1925.

m q-grm 6 sesameassa sins @s smr wsnns ELECTRIC a MANUFACTURING coMiPhnY; A conronnrion 0F i 'mssyrvams.

MOUNTING r03 SEWING-MACHINE Morons.

Application flied February it, 102-1. "swarm. 446,406.

JiqaAZ/whom itmay y Be it knownthat ILLEWIS C. .PACKER, a

citizenof the United States, and 1-'a;rfesident of Springfield in the county of 'H-ampden assachusetts, have invented a new and useful Improvement in Mountings for Sewin -Machine Motors, of which the following 1s {a specification.

My invention relates to machines, such as sewing inachines that are equipped for operation by electric motors, and it has for its object to provide a structure wherein the machine and the motor are runited in an imcompact and inexpensive cembiznation. 1

My invention comprises (1 structure for mounting whereby an electric motor may be mounted uponv the head of a sewing machine by meansof astubshaft. V y H Hei'etotoratit has been customary to drive a sewing machine by means of a motor so disposed on a machine table as to engage the hand wheel, or by fastening the motor to the machine frame by means of acompli- 'cated and expensive supporting structure.

Briefly, my invention comprises providing the motor with an extra casing through which a stub shait projects into the head of the machine, and providing a resilient memso disposed within the extra oasingjas to bias said motor to a position in which a hand wheel motor-driven pinion engages the of the machine. 7,

In the accompanying drawings,

F-gure 1 is a side elevational view of a portion of a sewing machine provided with a motor constructed'in accordance with my invention. i-

Fig; 2 is a crossssectional view of the structureillustrated in Fig. 1; taken along the line II-' II,- thereof. f i y 1 Fig. 3 is also a cross-sectional-vie'w of the structure illustrated in Fig.1, the section being taken along the 1ineIIIIII thereof.

In the drawings, asewinginachine head 1 is provided with the usual shaft't 2 and hand wheel 3. The head 1 is provided with an indented intermediate portion 4-, as best shown in Fig; 2, the central portion of which is providedwith a boss .6 having a machined surface. The boss6 is provided with a central threaded opening ;Within the opening fi is disposed a sjtubshaft; 7,;one'end 8, 'of which is-ithreade'd to co-operate. with i the threaded "5. the opposite end9 of the shaft 7 is =pivotal ly, mounted nn 616013130. motor 10 provided, with a shaftfll upon which is mounted a driving zpinion .12

which engages andgjdnives the hahdwheel 3 of the sewing machine.

The;e1ectricmotor 10 jsprovid d with an outer casing 13,,. one sid of which is v dedw-ith an opening 514:. This opening is closedbfy means of auXilia-rycasing me ber 15 which extends thereover and-is rigid- 1 1y fastenedto the motor, casing-1'3. The'casing 15 is provided with an :opening 16 th'rethrough which the shafft .7 extends}. That portionof the casing 15 immediately adjacent to the opening 16 ismachined fiat so as to engage the machined surface 6 oft-he headrlho Upon theen'd 90f the shaft7 ismou-nted coiled spring, 17,- one endof which i-sfattached to the shaft 9 and the other end ;of which is attached to the casingmemher 1-5. The spring tends to cause relative rotation between the pinv7 and theumotor 10in such direction as to maintain the. pinion 12 in engagement with the hand wheel '3.

-Thus the, spring 17 and one end 9 of the shaft 7 are totally "enclosed by means of the auxiliary. casin'g, "member .15, while, the Jother ,end :of the shaift projects into threaded engagement with the opening, 5 in the headfl, thereby supportlng the motor. Thus; it is seen that when the motor is in itsoperative position,

the stub shaft 7 isrigidly' fixed with respect to thehead 1 and that the :motor 10 is pivotally inounted: thereon. I 1 g The shaft 7 is so disposed with respect to the motor l3 that the-axis thereof passes substantiallythrough the center of gravity thereof. By so mounting the motor, the work imposed on the spring 17 that of maintainingthe pinion 1-2 in yielding m my invention may be assembled by mounting the stub shaft- 7 within' the auxiliary-cats comprising a stub shaft projecting into said ing member 15. The casing member 15 is then attached to the motor casing 13 to close the opening 14c therein. H The hand" wheel 3 is then removed, and, by rotating the motor 10, the end 8 of the shaft 7 is movedinto threaded engagement with the walls of the opening in the head of the machine, thus locking the motor 10 in position. -.The

motor is then biased to depress the driving wheel 12 below its normal position'while the hand wheel 3 is mounted on the shaft 2. v The motor'is then released and is returned to its normal position, with the pinion 12 in engagement with the hand wheel 3 by means of the spring 17.

By reason of mounting the motor within the indented portion'4 in thehead member 1, and by usingaflat sided motor, the-oven all width of the machine is reduced to a minimum, thus permitting the use of amotor of this type on a machine of the drop-head type, in which a relatively: wide machine could not be used with thestandard'type of table now l1'1'l1S6.- r 7 While]; have shown and described in detail but asingle application of my invention, it will be obvious to those skilled inthe art that it is not so limited but is susceptible of various minor changes andmodifications Without departing from the spirit thereof, and I desire, therefore," that only such limitations shall be-placed thereupon as are imposed by'the prior art or as are specifically setforth in the appended claims.

I 'claimas my invention: i 1. In combination, a sewing-machine head comprising an uprightstandard having a hand wheel mounted thereon, a driving motor provided with a driving wheel yield ingly-maintained in engagement with said hand wheel and means for mounting said motor'on said upright'standard, said means head, and said motor being pivot'allymounted to; move about saidshaftas an axis.

2-; In combination, a sewing-machine head comprising an upright standard having-a hand wheel mounted thereon, a driving motor provided witha driving wheel yieldingly maintained-in engagement with said hand wheel and means for mounting said motor on said upright standard, saidmeans comprising a stub shaft projectinginto said head,=and said motor being-pivotally mounthand wheel, means for mounting-said motor" on said upright stan'dard,"sa1d means com ed to moveabout said shaft as 'an aXis, said axis passing through substantially the center of gravity of said motor. j 3. In combmation, a sew ng-machine head comprising an upright standard having a hand wheel mounted thereon,fa driving motor provided with a drivingwheeljyieldingly maintained in engagement with said prising a stub' shaft projecting into said head, and said motor being pivotally mounted to move about said shaft as an axis, said axis passing substantially through the center of gravity of said dynamo-electric machine, and a spring so disposed as to,b1as said motorto move said driving wheel into 'engagement with said hand wheell 5t. In combinatioma sewing-machine head comprising an upright standard having a hand wheel mounted thereon, a driving motor provided with a driving wheel yieldingly maintained in engagement with said hand wheel,"means for mounting said motor on said head comprising'a stub shaftpr'oje'cting into said standard, said motor being pivotally mounted on said shaft, and a spring connected to said stub shaft and adapted to bias said motor to hold said driving wheel in engagement-with said'hand wheel. 1

5. In combination, a sewing-machinehead comprising'an upright standard having a hand wheel mounted thereon, a driving motor provided with a driving wheel yieldingly maintained in "engagement with said hand wheel, means for mounting said motor onsaid upright "standard comprising a stub shaft projecting into said*standard,-and a casing enclosing a portion of said shaft and I pivotally mounted thereomsaidcasing being rigidly attached to said 1 dynamo eleotric machine. "j

6. In combination, a dynam -electriC machine providedwith a casing, a pin projecting into one wall of said casingan'd movable with respect thereto, resilient 'me'ans-"disposed within said casing tending to rotate said pin with respect' to said casing, and means engaging said pin for supporting said dynamo-electric machine.

"9. In combination, a dynamo-electric'machine provided with a casing, a stub shaft projecting into one wall of said casing,- a spring disposed within said casingiand tending to rotate said shaft with respect tosaid casing, and means secured to the projecting end of said shaft for supporting "said dynamo-electric machin'ef a l 1 10. In combinatioma dynamo-electric-machine provided with a casing, a" stub shaft projecting through said easing, a spring disposed Within said casing and coiled about said shaft and tending to rotate the same with respect to said casing, the projecting portion of the stub shaft being provided With a threaded portion, and means for receiving the threaded portion of said shaft for supporting said dynamo-eiect-ric machine.

subscribed my name this fourth day of February, 1921.

LEWIS o. PACKER. 

